Oregon Revised Statutes Water Resources: Irrigation, Drainage, Flood Control, Reclamation § 552.438

(1) A district may construct works across or along any street or public highway, or over any lands which are property of this state, or any subdivision thereof. A district may construct its work across and along any stream of water or watercourse.

(2) Any works across or along any highway, road or street shall be constructed only with the permission of the Department of Transportation, the county board or the city governing body having jurisdiction of the highway, road or street. The district shall restore any highway, road or street to its former state as near as may be and shall not use the right of way in a manner unnecessarily to impair its usefulness.